Naruto could end up getting involved in quests to help those in need and earning a reputation as a rogue ninja with a heart of gold. There might also be old enemies seeking revenge, forcing him to constantly be on guard. And of course, his bond with Sakura would likely be tested in various ways.
He might face new enemies and challenges outside Konoha, having to prove himself independently without the village's support.
Well, it could go in many directions. Maybe Naruto starts a quest to find a way to bring peace to the ninja world on his own terms. Or perhaps he has to deal with the consequences of leaving Konoha and tries to prove his intentions were pure.
Well, it could be that Naruto leaves because he realizes that Konoha's ways don't align with his ideals anymore after that intense mission. Or perhaps there are hidden threats that force him to go away for the greater good.
Well, he could encounter new allies and enemies in different villages and face all kinds of challenges on his own journey.
Maybe Naruto leaves because he discovers some deep-seated secrets about Konoha that he can't accept. Or it could be that his relationship with Sasuke changes his perspective and he needs to find a new place to grow and evolve.
One possible plot could be that Naruto leaves Konoha due to some misunderstanding. Maybe he feels unappreciated in his relationship with Sakura (Narusaku). He might go on a journey to find himself. Along the way, he could encounter new enemies and also make new friends who help him see things from a different perspective.
In a NaruSaku - Naruto brings Sasuke back fanfiction, Naruto could have a vision of a future where Sasuke's return and his relationship with Sakura are intertwined. This vision gives him the strength to endure all the challenges on his way to find Sasuke. Sakura, on the other hand, is constantly worried about Naruto but also has faith in him. When Naruto finally reaches Sasuke, he tells him about this vision and how their lives are all connected in Konoha, which makes Sasuke start to consider coming back.
Naruto might initially be in denial. He's so used to having Sakura around and believing that they have a future together. So when she leaves for Sasuke, he might think it's just a temporary thing or that she's been influenced by something or someone. But as time passes and he realizes it's real, he would be deeply hurt. He might also start to question his own self - worth, thinking that he wasn't good enough for Sakura. And he might even try to win her back at first, but then slowly come to accept the situation and focus on his other responsibilities like being a ninja and protecting the village.
Sakura's role can be multi - faceted. Firstly, she could be the one who heals the emotional wounds of both Naruto and Sasuke. After all the battles and separations, there are likely to be a lot of emotional traumas. Her medical skills could be a metaphor for her ability to heal their hearts. Secondly, Sakura can act as a stabilizer. When Naruto tries to convince Sasuke to come back, Sakura's presence can keep the situation from getting out of hand. Her calm and rational side can prevent any potential violent outbursts from Sasuke and ensure that the conversation stays on track towards Sasuke's return.
His relationships with his friends like Sasuke and Kakashi would also be affected. Sasuke might understand Naruto's decision on some level, having also left the village before. Kakashi, on the other hand, would be worried about Naruto. He might try to find him and bring him back. This could create some tension between Naruto and Kakashi as Naruto tries to assert his independence.
He might discover long - lost jutsu. Ancient ruins could hold scrolls with forgotten techniques that Naruto could learn and use to become even stronger in his ninja journey.